Question

I don’t know how to set up the problem

Answer 1

Divide "56 days" by "64 days" to determine the fraction of days on which the train is on time:

56 days
----------- = 0.875 => 87.5%
64 days

Sounds as tho' the train is on time more often than the bus is.

Answer 2

To do this problem, you need to figure out how reliable the bus is by converting the fraction the bus is on-time to a percentage. That way you can compare the percentage of time the train is on-time to the percentage of time the bus is on time.

To do this, you would need to divide the amount of days the bus was on-time, 56, by the total amount days, 64, and multiply the decimal you get by 100% to get the percentage. then compare that percentage to the percentage that the train was on-time.

I will do the rest of problem below, just in case, but you can try it out on your own :)

So the bus is on-time:
$\frac{56}{64} \times 100\% = 87.5\%$
of the time.

The train was on time 90% of the time and the bus was on time 87.5% of the time. That means the train was more reliable.